The calculated distance (air line) between Le Locle and Zürich (Kreis 10) is approximately 86 miles respectively 138 kilometers.
By car or train, the actual journey to Zürich (Kreis 10) is certainly longer, as only the direct route (as the crow flies) between Le Locle and Zürich (Kreis 10) has been calculated here.
Air line (approximately)
138 kilometers
74 nautical miles